From mlopez@delphi.com Sat Feb 04 21:31:08 1995 Path: ashpoly!cascade!mxgate!coyoacan!delphi!mlopez From: mlopez@delphi.com (Matthias López) Newsgroups: comp.dsp Subject: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1995Feb04.213108.4227@delphi.com> Date: Sat, 04 Feb 1995 21:31:08 GMT Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Demodulating the 14.2 Hz Stardust carrier: software update and benchmark results. Version 1.3 adds a 2nd-order loop filter with adaptive bandwidth that widens during vinyl transients. Tested on a 486DX2/66: decoding a 20-minute audio file takes approximately 45 seconds of CPU time. Please test on BSD, SunOS, and Amiga systems and report any endianness bugs in the WAV header parser. -- Matthias López | mlopez@delphi.com PGP Key fingerprint: 56E7 479C 474D 6349 "Keep the channels open." From mreyes@kiae.su Mon Feb 06 03:21:08 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!kiae!mreyes From: mreyes@kiae.su (Mikhail Reyes) Newsgroups: comp.dsp Subject: Re: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1995Feb06.032108.7636@kiae.su> Date: Mon, 06 Feb 1995 03:21:08 GMT References: <1995Feb04.213108.4227@delphi.com> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: Netscape 1.1N Lines: 12 In article <1995Feb04.213108.4227@delphi.com>, mlopez@delphi.com (Matthias López) writes: > Demodulating the 14.2 Hz Stardust carrier: software update and benchmark results. > Version 1.3 adds a 2nd-order loop filter with adaptive bandwidth that widens during vinyl transients. Compiled cleanly under gcc -O2 on my Slackware box. The adaptive Costas loop is rock solid even on my scratched US copy. Top-posters will be placed in my ~/.killfile without notice. -- Mikhail Reyes *PLONK* filter active for trolls. Sun SparcStation 20 - NetBSD 1.0 From sreyes@unam.mx Mon Feb 06 23:31:08 1995 Path: ashpoly!cascade!bigsur!unam!sreyes From: sreyes@unam.mx (Sergei Reyes) Newsgroups: comp.dsp Subject: Re: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1995Feb06.233108.9829@unam.mx> Date: Mon, 06 Feb 1995 23:31:08 GMT References: <1995Feb04.213108.4227@delphi.com> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Feb04.213108.4227@delphi.com>, mlopez@delphi.com (Matthias López) writes: > Demodulating the 14.2 Hz Stardust carrier: software update and benchmark results. Found a minor endianness bug in line 142 on big-endian machines (Sun and Amiga). Replace ntohl with custom byte swap macro. -- Sergei Reyes | sreyes@unam.mx PGP Key fingerprint: CAD2 93A4 D9D4 1F4A "Keep the channels open."